542 lines
11 KiB
C
542 lines
11 KiB
C
/* (C)opyright MMVI-MMVII Anselm R. Garbe <garbeam at gmail dot com>
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* (C)opyright MMVI-MMVII Sander van Dijk <a dot h dot vandijk at gmail dot com>
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* See LICENSE file for license details.
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*/
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#include "dmenu.h"
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#include <ctype.h>
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#include <locale.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <X11/Xutil.h>
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#include <X11/keysym.h>
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#define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
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typedef struct Item Item;
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struct Item {
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Item *next; /* traverses all items */
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Item *left, *right; /* traverses items matching current search pattern */
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char *text;
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};
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/* static */
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static char text[4096];
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static char *prompt = NULL;
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static int mw, mh;
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static int ret = 0;
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static int nitem = 0;
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static unsigned int cmdw = 0;
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static unsigned int promptw = 0;
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static unsigned int numlockmask = 0;
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static Bool running = True;
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static Item *allitems = NULL; /* first of all items */
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static Item *item = NULL; /* first of pattern matching items */
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static Item *sel = NULL;
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static Item *next = NULL;
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static Item *prev = NULL;
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static Item *curr = NULL;
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static Window root;
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static Window win;
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static void
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calcoffsets(void) {
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unsigned int tw, w;
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if(!curr)
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return;
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w = promptw + cmdw + 2 * SPACE;
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for(next = curr; next; next=next->right) {
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tw = textw(next->text);
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if(tw > mw / 3)
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tw = mw / 3;
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w += tw;
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if(w > mw)
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break;
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}
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w = promptw + cmdw + 2 * SPACE;
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for(prev = curr; prev && prev->left; prev=prev->left) {
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tw = textw(prev->left->text);
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if(tw > mw / 3)
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tw = mw / 3;
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w += tw;
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if(w > mw)
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break;
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}
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}
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static void
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drawmenu(void) {
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Item *i;
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dc.x = 0;
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dc.y = 0;
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dc.w = mw;
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dc.h = mh;
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drawtext(NULL, dc.norm);
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/* print prompt? */
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if(promptw) {
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dc.w = promptw;
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drawtext(prompt, dc.sel);
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}
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dc.x += promptw;
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dc.w = mw - promptw;
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/* print command */
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if(cmdw && item)
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dc.w = cmdw;
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drawtext(text[0] ? text : NULL, dc.norm);
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dc.x += cmdw;
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if(curr) {
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dc.w = SPACE;
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drawtext((curr && curr->left) ? "<" : NULL, dc.norm);
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dc.x += dc.w;
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/* determine maximum items */
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for(i = curr; i != next; i=i->right) {
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dc.w = textw(i->text);
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if(dc.w > mw / 3)
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dc.w = mw / 3;
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drawtext(i->text, (sel == i) ? dc.sel : dc.norm);
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dc.x += dc.w;
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}
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dc.x = mw - SPACE;
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dc.w = SPACE;
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drawtext(next ? ">" : NULL, dc.norm);
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}
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XCopyArea(dpy, dc.drawable, win, dc.gc, 0, 0, mw, mh, 0, 0);
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XFlush(dpy);
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}
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static void
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grabkeyboard(void) {
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while(XGrabKeyboard(dpy, root, True, GrabModeAsync,
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GrabModeAsync, CurrentTime) != GrabSuccess)
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usleep(1000);
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}
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static unsigned long
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initcolor(const char *colstr) {
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Colormap cmap = DefaultColormap(dpy, screen);
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XColor color;
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if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
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eprint("error, cannot allocate color '%s'\n", colstr);
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return color.pixel;
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}
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static void
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initfont(const char *fontstr) {
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char *def, **missing;
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int i, n;
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missing = NULL;
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if(dc.font.set)
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XFreeFontSet(dpy, dc.font.set);
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dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
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if(missing)
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XFreeStringList(missing);
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if(dc.font.set) {
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XFontSetExtents *font_extents;
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XFontStruct **xfonts;
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char **font_names;
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dc.font.ascent = dc.font.descent = 0;
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font_extents = XExtentsOfFontSet(dc.font.set);
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n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
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for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
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if(dc.font.ascent < (*xfonts)->ascent)
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dc.font.ascent = (*xfonts)->ascent;
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if(dc.font.descent < (*xfonts)->descent)
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dc.font.descent = (*xfonts)->descent;
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xfonts++;
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}
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}
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else {
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if(dc.font.xfont)
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XFreeFont(dpy, dc.font.xfont);
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dc.font.xfont = NULL;
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if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr)))
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eprint("error, cannot load font: '%s'\n", fontstr);
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dc.font.ascent = dc.font.xfont->ascent;
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dc.font.descent = dc.font.xfont->descent;
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}
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dc.font.height = dc.font.ascent + dc.font.descent;
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}
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static void
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match(char *pattern) {
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unsigned int plen;
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Item *i, *j;
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if(!pattern)
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return;
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plen = strlen(pattern);
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item = j = NULL;
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nitem = 0;
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for(i = allitems; i; i=i->next)
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if(!plen || !strncmp(pattern, i->text, plen)) {
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if(!j)
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item = i;
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else
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j->right = i;
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i->left = j;
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i->right = NULL;
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j = i;
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nitem++;
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}
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for(i = allitems; i; i=i->next)
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if(plen && strncmp(pattern, i->text, plen)
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&& strstr(i->text, pattern)) {
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if(!j)
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item = i;
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else
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j->right = i;
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i->left = j;
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i->right = NULL;
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j = i;
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nitem++;
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}
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curr = prev = next = sel = item;
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calcoffsets();
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}
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static void
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kpress(XKeyEvent * e) {
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char buf[32];
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int i, num, prev_nitem;
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unsigned int len;
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KeySym ksym;
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len = strlen(text);
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buf[0] = 0;
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num = XLookupString(e, buf, sizeof buf, &ksym, 0);
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if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
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|| IsMiscFunctionKey(ksym) || IsPFKey(ksym)
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|| IsPrivateKeypadKey(ksym))
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return;
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/* first check if a control mask is omitted */
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if(e->state & ControlMask) {
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switch (ksym) {
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default: /* ignore other control sequences */
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return;
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case XK_bracketleft:
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ksym = XK_Escape;
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break;
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case XK_h:
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case XK_H:
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ksym = XK_BackSpace;
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break;
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case XK_i:
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case XK_I:
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ksym = XK_Tab;
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break;
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case XK_j:
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case XK_J:
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ksym = XK_Return;
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break;
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case XK_u:
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case XK_U:
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text[0] = 0;
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match(text);
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drawmenu();
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return;
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case XK_w:
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case XK_W:
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if(len) {
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i = len - 1;
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while(i >= 0 && text[i] == ' ')
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text[i--] = 0;
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while(i >= 0 && text[i] != ' ')
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text[i--] = 0;
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match(text);
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drawmenu();
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}
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return;
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}
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}
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if(CLEANMASK(e->state) & Mod1Mask) {
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switch(ksym) {
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default: return;
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case XK_h:
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ksym = XK_Left;
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break;
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case XK_l:
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ksym = XK_Right;
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break;
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case XK_j:
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ksym = XK_Next;
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break;
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case XK_k:
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ksym = XK_Prior;
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break;
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case XK_g:
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ksym = XK_Home;
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break;
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case XK_G:
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ksym = XK_End;
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break;
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}
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}
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switch(ksym) {
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default:
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if(num && !iscntrl((int) buf[0])) {
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buf[num] = 0;
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if(len > 0)
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strncat(text, buf, sizeof text);
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else
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strncpy(text, buf, sizeof text);
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match(text);
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}
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break;
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case XK_BackSpace:
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if(len) {
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text[--len] = 0;
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match(text);
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}
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break;
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case XK_End:
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if(!item)
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return;
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while(next) {
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sel = curr = next;
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calcoffsets();
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}
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while(sel && sel->right)
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sel = sel->right;
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break;
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case XK_Escape:
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ret = 1;
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running = False;
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break;
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case XK_Home:
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if(!item)
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return;
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sel = curr = item;
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calcoffsets();
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break;
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case XK_Left:
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if(!(sel && sel->left))
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return;
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sel=sel->left;
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if(sel->right == curr) {
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curr = prev;
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calcoffsets();
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}
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break;
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case XK_Next:
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if(!next)
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return;
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sel = curr = next;
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calcoffsets();
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break;
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case XK_Prior:
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if(!prev)
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return;
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sel = curr = prev;
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calcoffsets();
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break;
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case XK_Return:
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if((e->state & ShiftMask) && text)
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fprintf(stdout, "%s", text);
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else if(sel)
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fprintf(stdout, "%s", sel->text);
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else if(text)
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fprintf(stdout, "%s", text);
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fflush(stdout);
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running = False;
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break;
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case XK_Right:
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if(!(sel && sel->right))
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return;
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sel=sel->right;
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if(sel == next) {
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curr = next;
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calcoffsets();
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}
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break;
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case XK_Tab:
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if(!sel)
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return;
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strncpy(text, sel->text, sizeof text);
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match(text);
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break;
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}
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drawmenu();
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}
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static char *
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readstdin(void) {
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static char *maxname = NULL;
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char *p, buf[1024];
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unsigned int len = 0, max = 0;
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Item *i, *new;
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i = 0;
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while(fgets(buf, sizeof buf, stdin)) {
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len = strlen(buf);
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if (buf[len - 1] == '\n')
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buf[len - 1] = 0;
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p = estrdup(buf);
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if(max < len) {
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maxname = p;
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max = len;
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}
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new = emalloc(sizeof(Item));
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new->next = new->left = new->right = NULL;
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new->text = p;
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if(!i)
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allitems = new;
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else
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i->next = new;
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i = new;
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}
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return maxname;
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}
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static void
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usage(void) {
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eprint("usage: dmenu [-b] [-fn <font>] [-nb <color>] [-nf <color>]\n"
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" [-p <prompt>] [-sb <color>] [-sf <color>] [-v]\n");
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}
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/* extern */
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int screen;
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Display *dpy;
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DC dc = {0};
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int
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main(int argc, char *argv[]) {
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Bool bottom = False;
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char *font = FONT;
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char *maxname;
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char *normbg = NORMBGCOLOR;
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char *normfg = NORMFGCOLOR;
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char *selbg = SELBGCOLOR;
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char *selfg = SELFGCOLOR;
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int i, j;
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Item *itm;
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XEvent ev;
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XModifierKeymap *modmap;
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XSetWindowAttributes wa;
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/* command line args */
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for(i = 1; i < argc; i++)
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if(!strncmp(argv[i], "-b", 3)) {
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bottom = True;
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}
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else if(!strncmp(argv[i], "-fn", 4)) {
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if(++i < argc) font = argv[i];
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}
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else if(!strncmp(argv[i], "-nb", 4)) {
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if(++i < argc) normbg = argv[i];
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}
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else if(!strncmp(argv[i], "-nf", 4)) {
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if(++i < argc) normfg = argv[i];
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}
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else if(!strncmp(argv[i], "-p", 3)) {
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if(++i < argc) prompt = argv[i];
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}
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else if(!strncmp(argv[i], "-sb", 4)) {
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if(++i < argc) selbg = argv[i];
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}
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else if(!strncmp(argv[i], "-sf", 4)) {
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if(++i < argc) selfg = argv[i];
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}
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else if(!strncmp(argv[i], "-v", 3))
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eprint("dmenu-"VERSION", (C)opyright MMVI-MMVII Anselm R. Garbe\n");
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else
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usage();
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setlocale(LC_CTYPE, "");
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dpy = XOpenDisplay(0);
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if(!dpy)
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eprint("dmenu: cannot open display\n");
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screen = DefaultScreen(dpy);
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root = RootWindow(dpy, screen);
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if(isatty(STDIN_FILENO)) {
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maxname = readstdin();
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grabkeyboard();
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}
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else { /* prevent keypress loss */
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grabkeyboard();
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maxname = readstdin();
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}
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/* init modifier map */
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modmap = XGetModifierMapping(dpy);
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for (i = 0; i < 8; i++) {
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for (j = 0; j < modmap->max_keypermod; j++) {
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if(modmap->modifiermap[i * modmap->max_keypermod + j]
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== XKeysymToKeycode(dpy, XK_Num_Lock))
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numlockmask = (1 << i);
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}
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}
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XFreeModifiermap(modmap);
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/* style */
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dc.norm[ColBG] = initcolor(normbg);
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dc.norm[ColFG] = initcolor(normfg);
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dc.sel[ColBG] = initcolor(selbg);
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dc.sel[ColFG] = initcolor(selfg);
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initfont(font);
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/* menu window */
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wa.override_redirect = 1;
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wa.background_pixmap = ParentRelative;
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wa.event_mask = ExposureMask | ButtonPressMask | KeyPressMask;
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mw = DisplayWidth(dpy, screen);
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mh = dc.font.height + 2;
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win = XCreateWindow(dpy, root, 0,
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bottom ? DisplayHeight(dpy, screen) - mh : 0, mw, mh, 0,
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DefaultDepth(dpy, screen), CopyFromParent,
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DefaultVisual(dpy, screen),
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CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
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/* pixmap */
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dc.drawable = XCreatePixmap(dpy, root, mw, mh, DefaultDepth(dpy, screen));
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dc.gc = XCreateGC(dpy, root, 0, 0);
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XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
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if(maxname)
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cmdw = textw(maxname);
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if(cmdw > mw / 3)
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cmdw = mw / 3;
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if(prompt)
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promptw = textw(prompt);
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if(promptw > mw / 5)
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promptw = mw / 5;
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text[0] = 0;
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match(text);
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XMapRaised(dpy, win);
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drawmenu();
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XSync(dpy, False);
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/* main event loop */
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while(running && !XNextEvent(dpy, &ev))
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switch (ev.type) {
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default: /* ignore all crap */
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break;
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case KeyPress:
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kpress(&ev.xkey);
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break;
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case Expose:
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if(ev.xexpose.count == 0)
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drawmenu();
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break;
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}
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/* cleanup */
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while(allitems) {
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itm = allitems->next;
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free(allitems->text);
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free(allitems);
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allitems = itm;
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}
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if(dc.font.set)
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XFreeFontSet(dpy, dc.font.set);
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else
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XFreeFont(dpy, dc.font.xfont);
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XFreePixmap(dpy, dc.drawable);
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XFreeGC(dpy, dc.gc);
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XDestroyWindow(dpy, win);
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XUngrabKeyboard(dpy, CurrentTime);
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XCloseDisplay(dpy);
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return ret;
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}
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